feat(FN-1908): merge fusion/fn-1908

packages/cli/skill/fusion/SKILL.md

@@ -26,6 +26,7 @@ Mission → Milestone → Slice → Feature → Task
 - **GitHub tools** — `fn_task_import_github`, `fn_task_import_github_issue`, `fn_task_browse_github_issues`
 - **Mission tools** — `fn_mission_create`, `fn_mission_list`, `fn_mission_show`, `fn_mission_delete`, `fn_milestone_add`, `fn_slice_add`, `fn_feature_add`, `fn_slice_activate`, `fn_feature_link_task`
 - **Agent tools** — `fn_agent_stop`, `fn_agent_start`
+- **Skills tools** — `fn_skills_search`, `fn_skills_install`
 - **Dashboard** — Use `/fn` command to start/stop the dashboard
 
 </essential_principles>

packages/cli/skill/fusion/references/extension-tools.md

@@ -262,6 +262,26 @@ Start (resume) a stopped agent. Transitions the agent from paused to active stat
 |-----------|------|----------|-------------|
 | `id` | string | ✓ | Agent ID to start (e.g., agent-abc123) |
 
+## Skills Tools
+
+### fn_skills_search
+
+Search the skills.sh directory for agent skills. Returns matching skills with names, sources, install counts, and install commands.
+
+| Parameter | Type | Required | Description |
+|-----------|------|----------|-------------|
+| `query` | string | ✓ | Search query — framework, technology, or capability (e.g., "react", "firebase", "testing", "docker") |
+| `limit` | number | — | Max results (default: 10, max: 50) |
+
+### fn_skills_install
+
+Install an agent skill from skills.sh into the current project. Downloads skill files into the project's skill directories.
+
+| Parameter | Type | Required | Description |
+|-----------|------|----------|-------------|
+| `source` | string | ✓ | GitHub source in owner/repo format (e.g., "firebase/agent-skills") |
+| `skill` | string | — | Specific skill name to install. Omit to install all skills from the source. |
+
 ## Dashboard Command
 
 ### /fn

packages/cli/skill/fusion/references/fusion-capabilities.md

@@ -37,6 +37,8 @@ Triage → Todo → In Progress → In Review → Done → Archived
 | `fn_feature_link_task` | Link a feature to a task |
 | `fn_agent_stop` | Stop (pause) a running agent |
 | `fn_agent_start` | Start (resume) a stopped agent |
+| `fn_skills_search` | Search skills.sh for agent skills |
+| `fn_skills_install` | Install a skill from skills.sh |
 
 ## CLI Commands (fn)